<section class="sec">
    <div class="row">
        <div class="col-md-12 pos">
            <div class="col-md-3 col-md-offset-1">
                <a href="">
                    <img src="img/baidu_logo.jpg" alt="" class="img-responsive logo_desc"/>
                    <span class="text-capitalize desc">baidu</span>
                </a>
            </div>
            <div class="col-md-3 ">
                <a href="">
                    <img src="img/google-logo.jpg" alt="" class="img-responsive logo_desc"/>
                    <span class="text-capitalize desc">google</span>
                </a>
            </div>
            <div class="col-md-3">
                <a href="">
                    <img src="img/weipinhui_logo.jpg" alt="" class="img-responsive logo_desc"/>
                    <span class="text-capitalize desc">网易</span>
                </a>
            </div>
        </div>

        <div class="col-md-12 pos">
            <div class="col-md-3 col-md-offset-1">
                <a href="">
                    <img src="img/youdao_logo.jpg" alt="" class="img-responsive logo_desc "/>
                    <span class="text-capitalize desc">有道词典</span>
                </a>
            </div>
            <div class="col-md-3 dd">
                <a href="">
                    <img src="img/qqyouxiang_logo.jpg" alt="" class="img-responsive logo_desc"/>
                    <span class="text-capitalize desc">QQ邮箱</span>
                </a>
            </div>
            <div class="col-md-3">
                <a href="">
                    <img src="img/weixin_logo.jpg" alt="" class="img-responsive logo_desc"/>
                    <span class="text-capitalize desc">网页版微信</span>
                </a>
            </div>
        </div>
    </div>
</section>